For the network of Fig. 5.151, determine the DC operating point and the voltage gain for the circuit shown.

Here are the solutions for Problems 11 and 12.

---

: For the network of Fig. 5.151:
Given: $V_{CC} = 12 \, \text{V}$, $R_B = 220 \, \text{k}\Omega$, $R_C = 2.2 \, \text{k}\Omega$, $\beta = 60$.
Assume $V_{BE} = 0.7 \, \text{V}$ for a silicon transistor.

First, calculate the DC operating point to find $r_e$.

Step 1: Calculate the base current $I_B$.

$$$$